Intensifier for magnetos.



I\I. & P. OSTENBERG.

INTENSIFIER FOR MAGNETOS.

APPLICATION FILED MAILZZ, 191].

Patented Nov. 13, 191?.

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stradine NERO OSTENIBERG AND PONI'TUSr OSTENBERG, OF SAN JOSE, CALIFORNIA.

INTENSIFIER FOR MAGNETOS.

Specification of Letters Patent.

Patented Nov. 13, 1917.

Application filed-March 22, 1917. Serial No. 156,699.

- into or out of action automatically according to the speed of the armature and driving shafts in connection with which itis used.

One object of the present invention is to produce an intensifier for magnetos which Will successfully cause-a succession of hot sparks or kick-off sparks in the engine cylinders when the engine is started, but which will automatically become inoperative when the engine is fairly started, again automat-ically assuming an operative position as the engine slows doivn to a stop.

Another object is to produce an intensifier.

operated by the centrifugal force manifested by the revol ing shafts and parts connected thereto, thereby simplifyingl the construction of the device and rendering it economical to manufacture, eas i of installation, and greatly reducing the4 number of Wearing parts and consequently rendering the device more durable than those forms commonly used.

lVith these and other objects in view our invention consists in the new and novel construction, provision, formation, combination and relative arrangement of parts, members and features, all as hereinafter described, shown in the drawings, and finally pointed out in the claims.

In the drawings:

Figure 1 is a vertical transverse section through our improved intensifying device 'oi'ieratively connected to the armature shaft of a magneto and a driving shaft.

Fig. 2 is a sectional view on line A-A of Fig. 1. l

Fi g. 3 illustrates a modilied form of detent mechanism. Fig. 4 illustrates a second modified form of detent mechanism.

Fig. 5 is a plan view of the detent shown in Fig. 4.

Similar characters of reference refer to similar parts throughout the several views, At 1 is shown a portion o a. magneto mounted on plate 2 and provided with armature shaft 3, armature shaft 3 being.

alined with driving shaft 4 mounted in bearings 5. At (S is shown a circular plate Secured to driving shaft 1, and at 7 is a second plate secured to armature shaft 3, plate 7 preferably being provided with a iiange 8 adapted to loosely inclose plate 6 and thereby form an inclosed chamber to contain the working parts of the mechanism. Plates 6 and 7 are connected by a spring 9 which encircles shafts 3 and it the ends thereof being set in plates 6 and 7 as shown at 10 and 11 respectively.

At 12 is shown a stop rigidly fixed in plate 2 and projecting outwardly until nearly touching flange 8 on plate 7. Rigidly mounted on the -under side of plate 7 near the perimeter thereof and vertical thereto is pin 13 having a detent 14 pivotally mounted thereon. Detent 14 is so formed as to have one short arm 15 projecting outwardly through opening 16 formed in flange 8 and having a Hat end surface 17 adapted to engage stop 12, and a longer heavier arm v18 projecting backvvardly Within flange 8 and having a tripping-pin engaging surface 19. Detent 14 is so formed as to have a limited swinging movement on its pivotal pin 13. At 20 is shown a tripping pin rigidly set in plate 6, normally placed a distance from the surface 19 on arm 18, but capable of contacting wlth said surface 19 When the device is operating as hereinafter described. A spring 21 is secured to flange 8 and operates against the outer edge of detent 14.

Inthe illustration we have shown a second detent and tripping pin mounted in the same manner as above described and designated by similar numerals accompanied by readily adapted for use With engines of one,

two, threeor morev cylinders.

In operation, when the engine is turned over slowly, armature shaft 3 is of course revolved by shaft 4 through the medium of spring 9 and plates G` and 7 to which the spring is secured. Detent 14 being in a normal positign as shown in solid lines it is carried around with plate 7 until surface 1 7 comes in contact with stop 12 whereupon the movement of detent 14, plate 7 and I armatureshaft 3 is stopped until trippingpin strikes surface 19 of arml 18 and forces arm 18 outwardly and arm 15 inwardly so that detent 14 assumes the position shown in dotted lines at 22, whereupon spring 9, being released, suddenly throws armature shaft 3 and the parts connected thereto forward -a distance until stopped by pin 20, thereby operating magneto in such a manner as to produce a hot spark as desired.

This movement of course removes pin 2O from surface 19 so that the spring 21 again throws arm 18 inward and arm 15 outward thereby setting detent 14 in position to contact with stop 12 during the next revolution. When the engine has gained sufficient speed this device is automatically rendered inoperative because the centrifugal force operates to throw the longer and heavier arm 18 of detent 14 outwardly, overcoming the 1very light pressure of spring 21, and thereby throwing short arm 15 inwardly and out of an operative position, said spring 21 automatically setting the detent 14 into automatically thrown outward by the forceA of gravity operating upon arm 18 when said arm 15 approaches stop 12 until the member 7 has gained suflicient speed to overcome the force of gravity vand maintain said arm 1y in the position indicated in dotted lines at 22.

Another embodimentof our /invention is shown in Fig.v 3 in which shafts 3 and 4 revolve in an opposite direction to that indicated in Fig. 2, and detent 14 is formed with an engaging surface to engage a stop .12. In this instance detent 14 isy held in the operative position by spring 24 sc- .cured to arm 1 8 ot' d eteut 14 and a pin 24,-

set in plate 6, and is tripped by a pin 24b set in plate 0. and operating against the inneredge of detent 14 when moved forward by revolving plate 6. l/Vhen detent 14 is thrown out of operation as described and `jnmps forward with the parts on which it is mounted by the re'leasedftension onspring 9, its-forward `movement is arrested by pin .24c set in plate 7. 'Vihen the' engine has gained sufticient speed the detent 14 is held in an inoperativeopsition by centrifugal force acting upon arm 18 and thereby holding itin an extended. position, spring 24 again moving it to an operative position whenv the speed of the revolving parts is suiliciently diminished.

lIn the embodiment shown in Fig. 4, stop 12 isformed with a short terminal arm 12a.

Detent 14 is formed as a bar having an arm' 14a projecting .from its outer end and adapted to engage the arm 12a of stop 12 when drawn inwardly. Detent 14 slides' operative position. l Detent 14 is tripped by i pin 29 set in plate 6 and operating against beveled edge 30 of detent 14. The forward lmovement of plate 7 is arrested by guide 25 coming ineontact with a pin 31 set in plate It is understood of course that while we have herein shown and described certain embodiments of our invention, that changes in form, construction and operation may be made within the scope of the appended claims, the embodiments disclosed serving to make clear the essential elements of our invention.

Having thus described our invention, what we claim as new and desire t'o secureV by Letters Patent, is

1. The combination with a driven member mounted on the armature shaft of a magneto and a driving member yieldingly connected thereto, of a stop positioned adjacent 'said members, and one or more detcnts pivotally and eccentrically mounted on said first mentioned member normally positioned to engage said stop when said members are. slowly revolved and centrifugally actuated to an inoperative position when said members are rotated at high speed.

2. The combination with a driven member mounted on the armature shaft of a magneto and a driving member yieldingly connected thereto, of a stop positioned adjacent said members, 4and one or more detents pivotally and eccentrically mounted on said first mentioned member normally positioned to engage said stop when said members are slwly revolved, and meal'ns carried by said second mentioned member for automatically removing, said detent or `detcnts from an operative to` an inoperative position at' predetermined intervals, said dctent ordet'cnts being centrifugally actuated to maintain an inoperative position when said members are revolving at high Speed.

3. The combination with a driven mem- -ber mounted on the armature shaft of a magneto and a driving member yieldingly connected thereto, of a stop positioned adjacent/said members, one or more detents pivotally and eccenti'ically mounted on said i'irst mentioned member and adapted to engage said stop, means for automatically positioning said detent or detents in engage ment with said stop when said members are' A mounted on the armature shaft oa inagneto and a driving member yieldingly connected thereto, of a stop positioned adjacent said members, and one or more detents piv otally mounted on said irst mentioned member, each detent having a short arm traveling'in the path in which said stop lies and making contact with saidstop when said members are slowly revolved and a heavier arm yieldingly connected to said first mentioned member, means for breaking the contact oi. said shcst arm and saidstop at a predetermined interval, said heavier arm being centrifugally operated to maintain said short arm in `an inoperative position when said members have attained a higher speed.

5. The combination with a driven member mounted on the armature shaft of a magneto and a driving member yieldingly con nected thereto, of a stop positioned adjacent said members, o'ne or more detents pivotally and eecentrically mounted on said first mentionedmember' and adapted to engage said stop, means for automatically positioning said detent or detents in engagement with said stop when said members are slowly revolved, means carried by said second mentionedmembe'r for disengaging said detent or detents from Vsaid stop at predetermined intervals, and centriiugally operated means for automatically maintaining said detent or detents in an inoperative position with relation to said stop when `said members are revolving at high speed.

6. The combination witha driven member mounted on the armature shaft of a magneto and a driving member yieldingly connected thereto, of a stop positioned adjacent said members, one or more detents pivotally and eccentrically mounted on said first mentioned member and adapted to engage said stop, re-

- silient means for automatically positioning saidde'tent or detents in engagement with said stop when said members are slowly revolved means carried by said second inen-y tioned member for disengaging said'detent or detente from said stop at predetermined intervals, and means for automatically maintaining said detent or detents in an inopera-1 tive position with relation to said stop when vsaid'rotarting members are revolving at high speed.

7. Theeombination with a driven member mounted on the armature shaft ofa magneto and a driving member yieldingly connecte thereto, 'and eccentrieally mounted on said rst nien-` tioned member, a ,stop mounted to engage said detent or detente and lock said firstmentioned member against movement 4when said second mentioned member is slowly revolved, means' mounted on said second mentioned member for disenga'ging said detent or deteiits from said stop at predetermined in terval's, means mounted on said second .inentioned member for limiting the forward movement of vsaid lirst mentioned member with relation to said seond mentioned meinber'when said detent or detents are disengagedy lfrom said stop, and centrifugally operated means Jfor maintaining said detent or detents in an inoperative position with relation to said stop when saidV members are rotated at high speed.

8. The combination with a driven memberv mounted on thearmature shaft of a magneto-and a driving member yieldinglyeonnected thereto, of one or more detents pivotally and eccentrically mounted on said tirst mentioned member, a stop mounted to engage said detent or detents and look said first mentionedmember against movement when said second mentioned member is slowly revolved, means mounted on said second mentioned member for disengagine said detent orf-detents from said Vstop at predetermined' intervals, means mounted 0n d of one or more detents .pivotallyfsaid second mentioned member for 1limiting f the forward movementr of said lirst nien- Y tioned member with relation to said second mentioned member when said detent. or der tents are disengaged from said stop, centrif-l ugally operated means for maintaining` said detent or detents in an inoperative position with relation to said stop lwhen said inemf high speed, and means March, 1917. v

NERO OSTENBERG. PONTUS OSTENBERG.

have hereunto 15th day of 

